public void onMessageReceived(MessageReceivedEvent event) {
            if (playerRepository.ifExists(event.getAuthor().getId()))  {
                System.out.println(":)");
                playerRepository.setExperience (event.getAuthor().getId(), playerRepository.getExperience(event.getAuthor().getId()) + 1);
                    if(getExperienceForLevel(Math.round(playerRepository.getLevel(event.getAuthor().getId()))) <= playerRepository.getExperience(event.getAuthor().getId())) {
                    playerRepository.setLevel(playerRepository.getLevel(event.getAuthor().getId()) + 1, event.getAuthor().getId());
                    MessageChannel channel = event.getChannel();
                    if(!event.getAuthor().isBot()) {
                    channel.sendMessage("GG <@" + event.getAuthor().getId() + "> just levelled up to level " + playerRepository.getLevel(event.getAuthor().getId())).queue();
            }}